Process for producing a polymer-modified exterior wall putty and product

Abstract

The application discloses a polymer modified outer wall putty manufacturing process and product, and comprises the following steps: preparing the following components by weight parts: inorganic cementing material 40-60 parts, aggregate 30-50 parts, polymer modifier 2-8 parts, cellulose ether 0.1-0.5 parts, waterproof agent 0.5-2 parts, and functional additive 0-5 parts; the inorganic cementing material and the aggregate are put into a mixer for dry mixing; the polymer modifier, the cellulose ether, the waterproof agent and the functional additive are added and mixed until uniform.

Description

Technical Field

[0001] This invention relates to the field of building materials technology, and more specifically, to a manufacturing process and product of polymer-modified exterior wall putty. Background Technology

[0002] Smoothing the exterior walls is a fundamental step in exterior wall decoration, typically achieved using exterior wall putty. Traditional exterior wall putty primarily uses inorganic binders such as cement and calcium carbonate as its base material. While it boasts high strength, it suffers from excessive rigidity, poor flexibility, and a tendency to shrink and crack. Furthermore, traditional putty layers have poor water resistance and impermeability, allowing moisture to easily penetrate the substrate, leading to dampness inside the wall, blistering and peeling of the finish, and even freeze-thaw damage in cold regions.

[0003] Current technology typically employs a two-step construction method: first applying a waterproof layer, then applying ordinary putty. This method is complex, time-consuming, and carries the risk of peeling due to poor compatibility between the waterproof layer and the putty layer. Both its reliability and cost-effectiveness need improvement. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a manufacturing process and product for polymer-modified exterior wall putty.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This invention discloses a manufacturing process for polymer-modified exterior wall putty, comprising the following steps: A. Raw material preparation: Prepare the following components by weight: 40-60 parts of inorganic cementitious material, 30-50 parts of aggregate, 2-8 parts of polymer modifier, 0.1-0.5 parts of cellulose ether, 0.5-2 parts of waterproofing agent, and 1-5 parts of functional additives;

[0007] B. Premixing: Inorganic cementitious materials and aggregates are put into a mixer for dry mixing;

[0008] C. Add polymer modifier, cellulose ether, waterproofing agent, and functional additive to the mixture from step B, and stir to mix.

[0009] D. Place the mixture obtained in step C into a homogenizer for high-speed homogenization for 2-10 minutes;

[0010] E. After homogenization, the finished dry powder putty is measured and then sealed and packaged.

[0011] Furthermore, the inorganic cementing material is silicate cement or white cement.

[0012] Furthermore, the aggregate is quartz sand, and the particle size distribution of the quartz sand is 40-70 mesh accounting for 20%-40%, and 70-140 mesh accounting for 60%-80%.

[0013] Furthermore, the functional additive is a hydrophobic agent.

[0014] Furthermore, the hydrophobic agent is selected from silanes, siloxanes, or metal soaps.

[0015] Furthermore, the polymer modifier is a redispersible latex powder, selected from at least one of vinyl acetate-ethylene copolymer powder, acrylate copolymer powder, and styrene-acrylate copolymer powder.

[0016] Furthermore, the waterproofing agent is lime or inorganic aluminum salt.

[0017] The present invention also discloses a polymer-modified exterior wall putty made using the above-described manufacturing process.

[0018] The beneficial effects of this invention are as follows: by adding a polymer modifier, an organic polymer flexible network is formed in the rigid structure of inorganic cement stone, achieving an organic combination of the inorganic rigid skeleton and the organic flexible network. This allows the putty layer to maintain high strength and high adhesion while possessing a certain degree of elastic deformation capability, effectively absorbing and dispersing stress caused by substrate deformation and temperature and humidity changes, thereby solving the problem of easy cracking of the putty layer. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of one structure of the mixer in this invention;

[0020] Figure 2 This is a cross-sectional view of the mixer in this invention;

[0021] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0023] Figure 5 for Figure 2 Enlarged view of point C in the middle;

[0024] Figure 6 This is a cross-sectional view of the bottom of the bucket in this invention. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Example 1, a manufacturing process for polymer-modified exterior wall putty, includes the following steps: A. Raw material preparation: Prepare the following components by weight: 40 parts inorganic cementitious material, 30 parts aggregate, 2 parts polymer modifier, 0.1 parts cellulose ether, 0.5 parts waterproofing agent, and 1 part functional additive.

[0027] The inorganic cementitious material is silicate cement. The aggregate is quartz sand, with a particle size distribution of 20% 40-70 mesh and 80% 70-140 mesh. The polymer modifier is redispersible latex powder, selected from at least one of vinyl acetate-ethylene copolymer powder, acrylate copolymer powder, and styrene-acrylate copolymer powder. The waterproofing agent is lime. The functional additive is a water-repellent agent. The water-repellent agent is selected from silane-based water-repellent materials such as isooctyltriethoxysilane, or siloxane-based water-repellent materials such as methylhydrosiloxane powder, or metal soap-based water-repellent materials such as calcium stearate.

[0028] B. Premixing: Add inorganic cementitious materials and aggregates to the mixer for dry mixing; the mixing time is 3 minutes.

[0029] C. Add polymer modifier, cellulose ether, waterproofing agent, and functional additive to the mixture from step B, and mix until homogeneous; the mixing time is 10 minutes; the materials to be added in this step can be mixed first and then added.

[0030] D. Place the mixture obtained in step C into a homogenizer for high-speed homogenization for 2 minutes to achieve a powder uniformity of ≤5% fluctuation range, so that the dry powder material forms a composite system with an inorganic rigid skeleton and an organic flexible network synergistic structure.

[0031] E. After the homogenized dry powder putty is measured, it is sealed and packaged to obtain the finished product.

[0032] Example 2, a manufacturing process for polymer-modified exterior wall putty, includes the following steps: A. Raw material preparation: Prepare the following components by weight: 60 parts inorganic cementitious material, 50 parts aggregate, 8 parts polymer modifier, 0.5 parts cellulose ether, 2 parts waterproofing agent, and 5 parts functional additives.

[0033] The inorganic cementitious material is white cement. The aggregate is quartz sand, with a particle size distribution of 40-70 mesh (40%) and 70-140 mesh (60%). The polymer modifier is redispersible latex powder, selected from at least one of vinyl acetate-ethylene copolymer powder, acrylate copolymer powder, and styrene-acrylate copolymer powder. The waterproofing agent is an inorganic aluminum salt. The functional additive is a water-repellent agent. The water-repellent agent is selected from silane-based water-repellent materials such as isooctyltriethoxysilane, or siloxane-based water-repellent materials such as methylhydrosiloxane powder, or metal soap-based water-repellent materials such as calcium stearate.

[0034] B. Premixing: Add inorganic cementitious materials and aggregates to the mixer for dry mixing; the mixing time is 8 minutes.

[0035] C. Add polymer modifier, cellulose ether, waterproofing agent, and functional additive to the mixture from step B, and mix until homogeneous; the mixing time is 20 minutes; the materials to be added in this step can be mixed first and then added.

[0036] D. Place the mixture obtained in step C into a homogenizer for high-speed homogenization for 10 minutes to achieve a powder uniformity of ≤5% fluctuation range, so that the dry powder material forms a composite system with an inorganic rigid skeleton and an organic flexible network synergistic structure.

[0037] E. After homogenization, the finished dry powder putty is measured and then sealed and packaged.

[0038] By adding polymer modifiers, an organic polymer flexible network is formed within the rigid structure of inorganic cement stone, achieving an organic combination of the inorganic rigid skeleton and the organic flexible network. This allows the putty layer to maintain high strength and adhesion while possessing a certain degree of elastic deformation capacity, effectively absorbing and dispersing stress caused by substrate deformation and temperature and humidity changes, thus solving the problem of easy cracking of the putty layer.

[0039] By adding water-repellent agents and other waterproofing components, the putty layer itself acquires active and durable waterproofing and seepage-resistant capabilities. This putty layer not only fulfills the function of leveling the base layer but also acts as a reliable waterproof layer, achieving waterproofing in one step. This simplifies the exterior wall construction process, reduces the types of materials and construction period, and improves the reliability and economy of the entire exterior wall system.

[0040] Using harmless raw materials, it meets the requirements of green building materials and provides support for ecological construction.

[0041] The mixer used in this process includes a main mixing tank 1, a secondary mixing tank 2, and a sleeve 7. The secondary mixing tank 2 is positioned above the main mixing tank 1. A main feed inlet 3 is connected to the side of the main mixing tank 1, and a secondary feed inlet 4 is connected to the side of the secondary mixing tank 2. The sleeve 7 is rotatably mounted on the secondary mixing tank 2, with its lower end inside the main mixing tank 1 and its upper end extending beyond the secondary mixing tank 2. A second stirring rod 17 and a stirring blade 14 are mounted on the side of the sleeve 7, with the second stirring rod 17 located inside the main mixing tank 1. The auxiliary mixing tank 2 includes an opening 15 at the bottom, and a sealing mechanism is provided at the opening 15. The main mixing tank 1 includes a notch 16 at the top, and the notches 16 are connected to each other. A lifting mechanism is installed on the auxiliary mixing tank 2. The lifting mechanism drives the connecting sleeve 7 to rise and fall. The mixing plate 14 is located inside the auxiliary mixing tank 2 or inside the main mixing tank 1. A guide rod 11 is installed on the upper part of the auxiliary mixing tank 2. The guide rod 11 passes through the lifting plate 6 and guides and limits the rise and fall of the lifting plate 6.

[0042] Inorganic cementitious materials and aggregates are added to the main mixing tank 1 for mixing. Since more materials will be added later, the main mixing tank 1 will not be completely filled, leaving some space. The inorganic cementitious materials and aggregates are mixed by a stirring rod 17 located in the middle of the main mixing tank 1 and a stirring mechanism located at the bottom, thus satisfying the mixing requirements of the materials in the main mixing tank 1. The materials to be added in step C can be pre-mixed in the auxiliary mixing tank 2 to ensure uniform dispersion of the components, prevent clumping, and facilitate subsequent mixing with the materials in the main mixing tank 1. After the materials in the auxiliary mixing tank 2 enter the main mixing tank 1, the height of the materials in the main mixing tank 1 increases. The materials at this position cannot be mixed by the stirring block 18 and the stirring mechanism. At this point, by lowering the stirring blade 14 into the main mixing tank 1, which is located near the top of the main mixing tank 1, the materials at this position can be mixed, thus ensuring that the materials in all parts of the main mixing tank 1 are mixed and evenly distributed. With this structural design, it is not necessary to pre-install a stirring component at the top of the main mixing tank 1, which can reduce the consumption of the stirring component during empty operation.

[0043] The auxiliary mixing tank 2 includes a tank bottom 33, with an opening 15 formed on the tank bottom 33. The opening 15 is radially arranged along the tank bottom 33. The sealing mechanism includes a linear actuator 34 and a sealing block 35. The linear actuator 34 drives the sealing block 35. Two linear actuators 34 are provided on one side, each driving two oppositely arranged sealing blocks 35. The linear actuators 34 drive the sealing blocks 35 to move relative to each other, causing the sealing blocks 35 to abut against each other to seal the opening 15. Since the material stirred in the auxiliary mixing tank 2 will subsequently enter the main mixing tank 1 for mixing, the sealing requirements at the opening 15 are not high. Sealing the opening 15 with the sealing block 35 can meet the corresponding requirements. The opening size of the opening 15 is slightly larger than the size of the projection of the stirring blade 14 onto the tank bottom 33, allowing the stirring blade 14 to pass smoothly through the opening 15 and the notch 16.

[0044] The linear actuator 34 drives the sealing block 35 to move away from each other, exposing the opening 15. The material in the auxiliary mixing tank 2 can fall into the main mixing tank 1 through the opening 15 and the notch 16, thereby mixing with the material in the main mixing tank 1. The subsequent mixing blade 14 can also enter the main mixing tank 1 through the opening 15 and the notch 16 to mix the material located at a higher position.

[0045] A rubber block 36 is installed at one end of the sealing block 35 near the center of the bottom 33 of the barrel. The rubber block 36 can abut against the outer circumference of the sleeve 7 to achieve a seal without affecting the rotation of the sleeve 7.

[0046] The lifting mechanism includes a lifting cylinder 5, which is driven and connected to a lifting plate 6. A sleeve 7 extends out of the lifting plate 6 at its upper end. A limiting flange 23 is connected to the outer periphery of the upper end of the sleeve 7. A positioning ring 25 is provided on the upper part of the lifting plate 6. A limiting ring 26 is fixed to the upper part of the positioning ring 25 by bolts. The inner diameter of the positioning ring 25 is larger than the outer diameter of the limiting flange 23, and the inner diameter of the limiting ring 26 is smaller than the outer diameter of the limiting flange 23.

[0047] The limiting flange 23 is located between the limiting ring 26 and the lifting plate 6. The axial movement of the limiting flange 23 is restricted by the limiting ring 26 and the lifting plate 6, so that the sleeve 7 rises and falls with the lifting plate 6. At the same time, the cooperation between the limiting ring 26 and the lifting plate 6 does not affect the rotation of the sleeve 7.

[0048] The auxiliary mixing tank 2 is equipped with a drive mechanism for rotating the sleeve 7. The drive mechanism includes a main motor 12, which drives a drive gear 9. A driven gear 8 is installed on the outer periphery of the sleeve 7. The drive gear 9 meshes with the driven gear 8. The length of the driven gear 8 is designed according to actual needs to ensure that it can maintain meshing with the drive gear 9 during the lifting and lowering of the sleeve 7.

[0049] A rotating shaft 37 is rotatably mounted at the bottom of the main mixing tank 1. A linkage shaft 13 is connected to the upper part of the rotating shaft 37. The upper end of the linkage shaft 13 extends into the lower end of the sleeve 7. A limiting groove 31 is formed inside the lower end of the sleeve 7. The limiting groove 31 is arranged along the axial direction of the sleeve 7. A limiting strip 32 is connected to the outer periphery of the linkage shaft 13. The limiting strip 32 is slidably connected to the limiting groove 31. A stirring mechanism is installed between the sleeve 7 and the rotating shaft 37. The stirring mechanism can be lowered and deformed by raising and lowering the sleeve 7, thereby increasing the radial length of the stirring mechanism and increasing the stirring range in the radial direction. This strengthens the stirring force on the material at the bottom of the main mixing tank 1, making the material mix better.

[0050] The stirring mechanism includes a connecting block 21 and two stirring rods 19. One end of each stirring rod 19 is hinged to the connecting block 21. A rotating seat 30 is mounted on the outer periphery of the rotating shaft 37 and the sleeve 7. The other ends of the two stirring rods 19 are respectively hinged to the rotating shaft 37 and the rotating seat 30 on the sleeve 7. Several stirring blocks 20 are mounted on the outer periphery of the stirring rods 19. A stirring blade 22 is mounted on the outer side of the connecting block 21. A counterweight is mounted on the lower end of the connecting block 21, which lowers the center of gravity of the connecting block 21, thus maintaining a vertical state and ensuring that the stirring blade 22 maintains a consistent direction of stirring.

[0051] As the sleeve 7 descends, the ends of the two stirring rods 19 that are hinged to the sleeve 7 and the rotating shaft 37 move closer together, causing the other ends of the two stirring rods 19 to move outward along the radial direction of the main mixing tank 1, thus enabling the stirring of materials further out.

[0052] The stirring rod 17 is rotatably connected to the sleeve 7. One end of the stirring rod 17 extends into the sleeve 7 and is connected to a driven bevel gear 29. Several support rods 24 are connected to the upper part of the limiting flange 23. A support plate 38 is connected to the upper end of each support rod 24. An auxiliary motor 10 is fixedly mounted on the support plate 38 and can rotate synchronously with the sleeve 7. The auxiliary motor 10 drives a drive shaft 27, which extends into the sleeve 7. A drive bevel gear 28 is connected to the lower end of the drive shaft 27 and meshes with the driven bevel gear 29. The auxiliary motor 10 drives the drive shaft 27 to rotate the drive bevel gear 28. The drive bevel gear 28, through the meshing driven bevel gear 29, drives the stirring rod 17 to rotate, thereby causing the stirring block 18 to rotate and stir the material. This causes the material to move axially, resulting in the material at different heights flowing and mixing.

[0053] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A method for preparing polymer-modified exterior wall putty, characterized in that, Includes the following steps: A. Raw material preparation: Prepare the following components by weight: 40-60 parts inorganic cementitious material, 30-50 parts aggregate, 2-8 parts polymer modifier, 0.1-0.5 parts cellulose ether, 0.5-2 parts waterproofing agent, and 1-5 parts functional additives; B. Premixing: Inorganic cementitious materials and aggregates are put into a mixer for dry mixing; The mixer includes a main mixing tank (1), a secondary mixing tank (2), and a sleeve (7). The secondary mixing tank (2) is positioned above the main mixing tank (1). A main feed inlet (3) is connected to the side of the main mixing tank (1), and a secondary feed inlet (4) is connected to the side of the secondary mixing tank (2). The sleeve (7) is rotatably positioned on the secondary mixing tank (2). The lower end of the sleeve (7) is located inside the main mixing tank (1), and the upper end of the sleeve (7) extends beyond the secondary mixing tank (2). A second stirring rod (17) and a stirring blade (14) are installed on the side of the sleeve (7). The second stirring rod (17) is located inside the main mixing tank (1). The secondary mixing tank (2) includes an opening (15) at the bottom, and a sealing mechanism is provided at the opening (15). The main mixing tank (1) includes a notch (16) at the top, and the opening (15) and the notch (16) are connected. A lifting mechanism is installed on the secondary mixing tank (2), and the lifting mechanism drives the sleeve (7). The lifting mechanism drives the sleeve (7) to lift, so that the stirring plate (14) is located in the auxiliary stirring tank (2) or in the main stirring tank (1). A guide rod (11) is installed on the upper part of the auxiliary stirring tank (2). The guide rod (11) passes through the lifting plate (6) and guides and limits the lifting of the lifting plate (6) through the guide rod (11). The auxiliary stirring tank (2) includes a bottom (33) and an opening (15) is opened on the bottom (33). The opening (15) is arranged radially along the bottom (33). The sealing mechanism includes a linear driver (34) and a sealing block (35). The linear driver (34) drives the sealing block (35). There are two linear drivers (34) on one side, which drive the two sealing blocks (35) arranged opposite to each other. The linear driver (34) drives the sealing blocks (35) to move relative to each other, so that the sealing blocks (35) abut against each other to seal the opening (15). C. Add polymer modifier, cellulose ether, waterproofing agent, and functional additive to the mixture from step B, and stir to mix. D. Place the mixture obtained in step C into a homogenizer for high-speed homogenization for 2-10 minutes.

2. The method for preparing a polymer-modified exterior wall putty according to claim 1, characterized in that, The inorganic cementing material is silicate cement.

3. The method for preparing a polymer-modified exterior wall putty according to claim 1, characterized in that, The aggregate is quartz sand, with a particle size distribution of 40-70 mesh accounting for 20%-40% and 70-140 mesh accounting for 60%-80%.

4. The method for preparing a polymer-modified exterior wall putty according to claim 1, characterized in that, The functional additive is a hydrophobic agent.

5. The method for preparing a polymer-modified exterior wall putty according to claim 4, characterized in that, The hydrophobic agent is selected from silanes, siloxanes, or metal soaps.

6. The method for preparing a polymer-modified exterior wall putty according to claim 1, characterized in that, The polymer modifier is a redispersible latex powder.

7. The method for preparing a polymer-modified exterior wall putty according to claim 1, characterized in that, The waterproofing agent is lime or inorganic aluminum salt.

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